摘要: |
Electronics have changed the world, and the automobile is not exempt from these changes. Vehicles have changed dramatically over the years with the addition of electrical and electronic systems. Electronic control of the modem vehicle is a given, and this is not going anywhere. Modern automotive electronics will provide an ever-increasing complication when servicing vehicles. It is important to understand how electronics work, not only for the vehicles in your service bays today, but for the vehicles that will be there tomorrow. Electrical system control uses passive effects such as resistance, capacitance and inductance to control the current flow, whereas electronic control uses active effects such as amplification and rectification to control current flow. Both electrical and electronic principles are in use with the application of electronics. Electronic control can incorporate analog electronics or digital electronics. Analog electronics use continuously varying voltage signals, whereas digital electronics use a system where there are only two voltage levels. Both analog and digital systems are incorporated within the modem vehicle. |